<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>用户管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 搜索与添加区域 -->
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input placeholder="请输入内容"
          v-model="queryInfo.query" clearable
          @clear="getUserList">
            <el-button slot="append" icon="el-icon-search"
            @click="getUserList2"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="addDialogVisible = 
          true">添加用户</el-button>
        </el-col>
      </el-row>

      <!-- 用户列表区域 -->
      <el-table :data="userlist" border stripe>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="姓名" prop="username"></el-table-column>
        <el-table-column label="邮箱" prop="email"></el-table-column>
        <el-table-column label="电话" prop="mobile"></el-table-column>
        <el-table-column label="角色" prop="role_name"></el-table-column>
        <el-table-column label="状态">
          <template slot-scope="scope">
            <el-switch v-model="scope.row.mg_state" @change="userStateChanged(scope.row)">
            </el-switch>
          </template>
        </el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <!-- 修改按钮 -->
            <el-button type="primary" icon="el-icon-edit" 
            size="mini" @click="showEditDialog(scope.row.id)"></el-button>
            <!-- 删除按钮 -->
            <el-button type="danger" 
            icon="el-icon-delete" size="mini"
            @click="removeUserById(scope.row.id)"></el-button>
            <!-- 分配角色按钮 -->
            <el-tooltip class="item" effect="dark" content="分配角色" placement="top" :enterable="false">
               <el-button type="warning" icon="el-icon-setting" 
               size="mini" @click="setRole(scope.row)"></el-button>
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>

      <!-- 分页区域 -->
      <el-pagination
      @size-change="handleSizeChange"
      @current-change="handleCurrentChange"
      :current-page="queryInfo.pagenum"
      :page-sizes="[1, 2, 3, 4]"
      :page-size="queryInfo.pagesize"
      layout="total, sizes, prev, pager, next, jumper"
      :total="total">
    </el-pagination>
    </el-card>

    <!-- 添加用户的对话框 -->
    <el-dialog
      title="添加用户"
      :visible.sync="addDialogVisible"
      width="50%" @close="addDialogClosed">
      <!-- 内容主体区域 -->
      <el-form :model="addForm" :rules="addFormRules" 
      ref="addFormRef" label-width="70px">
        <el-form-item label="用户名" prop="username">
          <el-input v-model="addForm.username"></el-input>
        </el-form-item>
        <el-form-item label="密码" prop="password">
          <el-input v-model="addForm.password"></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="addForm.email"></el-input>
        </el-form-item>
        <el-form-item label="手机" prop="mobile">
          <el-input v-model="addForm.mobile"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改用户的对话框 -->
    <el-dialog
      title="修改用户"
      :visible.sync="editDialogVisible"
      width="50%" @close="editDialogClosed">
      <el-form :model="editForm" :rules="editFormRules" 
      ref="editFormRef" label-width="70px">
        <el-form-item label="用户名">
          <el-input v-model="editForm.username" disabled></el-input>
        </el-form-item>
        <el-form-item label="邮箱" prop="email">
          <el-input v-model="editForm.email"></el-input>
        </el-form-item>
        <el-form-item label="手机号" prop="mobile">
          <el-input v-model="editForm.mobile"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配角色的对话框 -->
    <el-dialog
      title="分配角色"
      :visible.sync="setRoleDialogVisible"
      width="50%" @close="setRoleDialogClosed">
      <div>
        <p>当前的用户:{{userInfo.username}}</p>
        <p>当前的角色: {{userInfo.role_name}}</p>
        <p>分配新角色:
          <el-select v-model="selectedRoleId" placeholder="请选择">
            <el-option
              v-for="item in rolesList"
              :key="item.id"
              :label="item.roleName"
              :value="item.id">
            </el-option>
          </el-select>
        </p>
      </div>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
  export default{
    name: '',
    data() {
      // 验证邮箱的规则
      var checkEmail = (rule, value, cb) => {
        // 验证邮箱的正则表达式
        const regEmail = /^[A-Za-z\d]+([-_.][A-Za-z\d]+)*@([A-Za-z\d]+[-.])+[A-Za-z\d]{2,4}$/  
        if(regEmail.test(value)) {
          // 合法的邮箱
          return cb()
        }

        cb(new Error('请输入合法的邮箱'))
      }

      // 验证手机号的规则
      var checkMobile = (rule, value, cb) => {
        // 验证手机号的正则表达式
        const regPhone = /^[1][3,4,5,7,8][0-9]{9}$/
        
        if(regPhone.test(value)) {
          return cb()
        }

        cb(new Error('请输入合法的手机号'))
      }
      return {
        // 获取用户列表的参数对象
        queryInfo: {
          query: '',
          // 当前的页数
          pagenum: 1,
          // 当前每页显示多少条数据
          pagesize: 2
        },
        userlist: [],
        total: 0,
        // 控制添加用户对话框的显示与隐藏
        addDialogVisible: false,
        // 添加用户的表单数据
        addForm: {
          username: "",
          password: '',
          email: '',
          mobile: ''
        },
        // 添加表单的验证规则对象
        addFormRules: {
          username: [
            { required: true, message: "请输入用户名",
            trigger: "blur"},
            { min: 3, max: 10, message: '用户名的长度在3~10字符之间',
            trigger: 'blur'}
          ],
          password: [
            { required: true, message: "请输入密码",
            trigger: "blur"},
            { min: 6, max: 15, message: '用户名的长度在6~15字符之间',
            trigger: 'blur'}
          ],
          email: [
            { required: true, message: "请输入邮箱",
            trigger: "blur"},
            { validator: checkEmail, trigger: 'blur' }
          ],
          mobile: [
            { required: true, message: "请输入邮箱",
            trigger: "blur"},
            { validator: checkMobile, trigger: 'blur'}
          ],
        },
        // 控制修改用户对话框显示与隐藏
        editDialogVisible: false,
        // 查询到的用户信息对象
        editForm: {},
        // 修改表单的验证规则对象
        editFormRules: {
          email: [
            { required: true, message: "请输入用户邮箱",
            trigger: "blur"},
            { validator: checkEmail, trigger: 'blur'}
          ],
          mobile: [
            { required: true, message: "请输入用户手机号码",
            trigger: "blur"},
            { validator: checkMobile, trigger: 'blur'}
          ],
        },
        // 控制分配角色对话框的显示与隐藏  
        setRoleDialogVisible: false,
        // 需要被分配角色的用户信息
        userInfo: {},
        // 所有角色的数据列表
        rolesList: [],
        // 已选中的角色Id值
        selectedRoleId: ''
      }
    },
    created() {
      this.getUserList()
    },
    methods: {
      async getUserList() {
        // params基础类型接收
        const {data: res} = await this.$http.get('users', { params: this.queryInfo })
        if(res.meta.status !== 200) {
          return this.$message.error('获取用户列表失败')
        }
        this.userlist = res.data.users
        this.total = res.data.total 
      },
      // 解决当在第二页搜索时出现的无数据问题
      async getUserList2() {
        // params基础类型接收
        this.queryInfo.pagenum = 1;
        const {data: res} = await this.$http.get('users', { params: this.queryInfo })
        if(res.meta.status !== 200) {
          return this.$message.error('获取用户列表失败')
        }
        this.userlist = res.data.users
        this.total = res.data.total 
      },
      // 监听 pagesize 改变的事件
      handleSizeChange(newSize) {
        // console.log(newSize)
        this.queryInfo.pagesize = newSize
        this.getUserList() 
      },
      // 监听 页码值 改变的事件
      handleCurrentChange(newPage) {
        // console.log(newPage)
        this.queryInfo.pagenum = newPage
        this.getUserList()
      },
      // 监听switch 开关状态的改变
      async userStateChanged(userinfo) {
        // 这里不用单引号用反引号是为了动态拼接参数  ${}作用是获取指定对象的值
        const{data: res} = await this.$http.put(`users/${userinfo.id}/state/${userinfo.mg_state}`)
        if(res.meta.status !== 200) {
          userinfo.mg_state = !userinfo.mg_state
          return this.$message.error('更新用户数据失败!')
        }
        this.$message.success('更新用户状态成功')
      },
      // 监听添加用户对话框的关闭事件
      addDialogClosed() {
        this.$refs.addFormRef.resetFields()
      },
      // 点击按钮,添加新用户
      addUser() {
        this.$refs.addFormRef.validate(async valid => {
          if(!valid) return
          // 可以发起添加用户的网络请求
          const {data: res} = await this.$http.post('users', this.addForm)

          if(res.meta.status !== 201) {
            this.$message.error('添加用户失败!')
            return
          }

          this.$message.success('添加用户成功')
          // 隐藏添加用户的对话框
          this.addDialogVisible = false
          // 重新获取用户列表数据 
          this.getUserList()
        })
      },
      // 展示编辑用户的对话框
      async showEditDialog(id) {
        // console.log(id)
        const {data: res} = await this.$http.get('users/' + id)
        if(res.meta.status !== 200) {
          return this.$message.error('查询用户信息失败')
        }

        this.editForm = res.data
        this.editDialogVisible = true;
      },
      // 监听修改对话框的关闭事件
      editDialogClosed() {
        this.$refs.editFormRef.resetFields()
      },
      // 修改用户信息并提交
      editUserInfo() {
        this.$refs.editFormRef.validate(async valid => {
          if(!valid) return
          // 发起修改用户信息数据请求
          const {data: res} = await this.$http.put('users/' + 
          this.editForm.id, {
            email:this.editForm.email, 
            mobile: this.editForm.mobile
          })

          if(res.meta.status !== 200) {
            return this.$message.error('更新用户信息失败')
          }

          // 关闭对话框
          this.editDialogVisible = false
          // 刷新数据列表
          this.getUserList()
          // 提示修改成功
          this.$message.success('更新用户信息成功!')
        })
      },
      // 根据Id删除对应的用户信息
      async removeUserById(id) {
        // 弹框用户是否删除数据
        const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err) 

        // 如果用户确认删除,则返回值为字符串 confirm
        // 如果用户取消了删除,则返回值为字符串 cancel
        // console.log(confirmResult)
        if(confirmResult !== 'confirm') {
          return this.$message.info('已取消删除')
        }
        
        const {data: res} = await this.$http.delete('users/' + id)
        
        if(res.meta.status !== 200) {
          return this.$message.error('删除用户失败')
        }
        this.$message.success('删除用户成功')
        this.getUserList()
      },
      // 展示分配角色的对话框
      async setRole(userInfo) {

        this.userInfo = userInfo

        //  在展示对话框之前,获取所有的角色列表
        const {data: res} = await this.$http.get('roles')
        if(res.meta.status !== 200) {
          return this.$message.error('获取角色列表失败!')
        }

        this.rolesList = res.data
        this.setRoleDialogVisible = true
      },
      // 点击按钮,分配角色
      async saveRoleInfo() {
        if(!this.selectedRoleId) {
          return this.$message.error('请选择要分配的角色!')
        }

        const {data: res} = await this.$http.put(`users/${this.userInfo.id}/role`,{rid: this.selectedRoleId})

        if(res.meta.status !== 200) {
          return this.$message.error('更新角色失败!')
        }

        this.$message.success('更新角色成功!')
        this.getUserList()
        this.setRoleDialogVisible = false
      },
      // 监听分配角色对话框的关闭事件
      setRoleDialogClosed() {
        this.selectedRoleId = ''
        this.userInfo = {}
      }
    }
  }
</script>

<style scoped>

</style>
